Steven has a background in maths and machine learning and has self-taught programming since young. He initially developed GoodNotes since 2010. Steven was handling everything on his own until Apple Pencil came out in 2015. Since then, Steven and his team have steadily grown to 20 people of top talents, building the product with cutting edge technologies. The app is regularly featured on Apple's commercial and marketing material and has been one of the top paid iPad apps worldwide. Steven still makes a hands-on contribution to iOS development and algorithm research for products regularly.